Fertilizer



Patented Sep. 7, 1926.

UNITED AT-as PATENT "oFFlcef cnonen nansxr,

0] NEW YORK N. Y., ASS I GNOB- 'IO AMERICAN CYANAMID COM- PM, 01' NEW YORK, IN. Y. I

I0 Drawing.

This invention relates to a method of lessening the risk of fire, that is always present when nitrate of soda .is handled,

The object of this invention is to afiord' a method of handling a troublesome chemical constituent so thatit may be. incorporated in-a fertilizer material as soon as possible after reaching thefplant, andthat all dan er of fire may be-removed both before or during mixingr With these and other objects in view the invention consists in the various 'ste s and combinations of steps constituting t e rocess-and in the new product all as w' be more fully hereinafter described and particularly pointed out in the ceived, some manufacturers were in habit. of adding a drying agent such as claims.

To more 7 illustrate my invention 1 may mix 1250 parts by wei ht of acid phosphate, 750 parts by weig t of nitrate of soda, and 250 parts by weight of calciunf cyanamid, and allow the whole to cure in 9. gives a d granular fertilizer material.

It has a ways been necessary to store nitrateof soda very carefully and have a practically fireroof storage space, preferably removed As the capacity was frequentl too small to hold large shipments, ferti 'zer manufacturers'were always anxious to mix the nitrate of soda and acid hosphate as soon as possible. This would ellminate the den er of fire but led to serious trouble in ot er directions. The mass was invariably wet,

soggy and ina physical condition that made it ard to work up. j To overcome this and,

still mix the nitrate of soda as soon as be ged too soon after pile as is customary. The above mixture rom the rest of the plant.

Application filed m as, 1923. sem No.6,484.

cotton seed meal. The .difliculty was overcome in this way but the fire-riskwas in creased. If the temperature. was allowed torise at all rapidly spontaneous-combustion invariably followed and frequentlythe whole plant was destroyed.

There was also a very considerable danger that a fire would occur even in the absence of organic matter in the mix, as the bags were liable to take fireif the productwere mixing. have now discovered thatthe trouble may be overcome by simultaneously mixingcalcium cyanamid with the mass, and allowing the whole to cure in the usual way.

It is obvious that those skilled in theart may vary the details of the rocess without departing therefore,'I do not wish to be limited to the above disclosures except as may be required by the claims appended hereto.

I claim:

1, A method of eliminating the fire-risk in the manufacture of a fertllizer material containing a nitrate which comprises addfrom the spirit 0 the invention,

ing substantially less than 50 0 of calcium cyanamid' to the material; su st'antially as described. i 2. A method of eliminatin the fire-risk inthe manufacture of a fertl 'zer material containing nitrate of soda which comprises adding substantially less than 50% of calcium cyanamid to the material; substantially as described.

3. A method of eliminating the fire-risk in the manufacture of a fertilizer material containing nitrate of soda and in contact with organic matter which comprises ad l inga minor proportion of-calcium cyan'amid to the material; substantially as described.

4.- A method of eliminating the fire-risk in the manufacture of'a' fertilizer material containing 750 parts by weight of nitrateof soda which comprises mixing apprpximate'ly 1250 parts by weight of acid hosphate, and'250 arts by weight of ca cium c anamid with t tially as described- 5. A new fertilizer material comprising a nitrate which is liable to ignite organic mae nitrate of soda; substanterial in contact with the same, and sutficient calcium cyanamid to prevent such ignition; ubstantially as described.

6. A new fertilizer material comprising a mixture of nitrate of soda. and acid phosphate, the ,above being present in such propcrtions as to' be liable to ignite Organic matter with which it comes in' contact; and sufficient calcium cyanamid to form'a dry, granular mass, that is -'not liable to ignitev 1 rganic matter With which it comes in contact; substantially as described. 5

I GEORGE BARSKY. 

